The X ray powder diffraction data of L Zn(C 6H 10 O 4N 2S 2)·0 5H 2O was collected by conventional X ray powder diffractometer. It was indexed successfully. The cell parameters were attained, a =2\^017 2(4) nm, b...The X ray powder diffraction data of L Zn(C 6H 10 O 4N 2S 2)·0 5H 2O was collected by conventional X ray powder diffractometer. It was indexed successfully. The cell parameters were attained, a =2\^017 2(4) nm, b =0\^960 7(2) nm, c =0\^503 3(1)nm, M 20 =33, F 30 =27(0\^011 4, 100), \{ V =\} 0\^975 4 nm 3 , the density D X=1 81 g/cm 3, so Z =4, and the possible space group is ascribed to P 2 122.展开更多
There are two theories, S_N1 and S_N2, for the mechanism of the deaquation ofaquopentaamincobalt (Ⅲ) bromide (AAC-B). Both of the theories are supported by some experimentaland calculated data. But there are not any ...There are two theories, S_N1 and S_N2, for the mechanism of the deaquation ofaquopentaamincobalt (Ⅲ) bromide (AAC-B). Both of the theories are supported by some experimentaland calculated data. But there are not any experiments to determine directly the structure of theintermediates at different reaction time. In this paper the structures of the intermediates atdifferent reaction time in deaquation-anation of AACB were determined by extended X-ray absorptionfine structure (EXAES) and the reaction process was studied by the combination of X-ray powderdiffraction and EXAES. It was demonstrated that the deaquation-anation of AACB obeys the S_N2theory.展开更多
文摘The X ray powder diffraction data of L Zn(C 6H 10 O 4N 2S 2)·0 5H 2O was collected by conventional X ray powder diffractometer. It was indexed successfully. The cell parameters were attained, a =2\^017 2(4) nm, b =0\^960 7(2) nm, c =0\^503 3(1)nm, M 20 =33, F 30 =27(0\^011 4, 100), \{ V =\} 0\^975 4 nm 3 , the density D X=1 81 g/cm 3, so Z =4, and the possible space group is ascribed to P 2 122.
文摘There are two theories, S_N1 and S_N2, for the mechanism of the deaquation ofaquopentaamincobalt (Ⅲ) bromide (AAC-B). Both of the theories are supported by some experimentaland calculated data. But there are not any experiments to determine directly the structure of theintermediates at different reaction time. In this paper the structures of the intermediates atdifferent reaction time in deaquation-anation of AACB were determined by extended X-ray absorptionfine structure (EXAES) and the reaction process was studied by the combination of X-ray powderdiffraction and EXAES. It was demonstrated that the deaquation-anation of AACB obeys the S_N2theory.
